Simplifie en additionnant les termes semblables :
-9n + -6n + (-7,1) + (-3,4)​

1. are the triangles similar and if so why? what is the value of x? show your work.

Abcd is a square. what is the measure of angle bac

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.